GB2464128A - Method of controlling glow plugs for a combustion engine - Google Patents
Method of controlling glow plugs for a combustion engine Download PDFInfo
- Publication number
- GB2464128A GB2464128A GB0818207A GB0818207A GB2464128A GB 2464128 A GB2464128 A GB 2464128A GB 0818207 A GB0818207 A GB 0818207A GB 0818207 A GB0818207 A GB 0818207A GB 2464128 A GB2464128 A GB 2464128A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glow plug
- temperature
- thermal energy
- vehicle
- glow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000000919 ceramic Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
- F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
- F02P19/025—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs with means for determining glow plug temperature or glow plug resistance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
- F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
- F23Q7/001—Glowing plugs for internal-combustion engines
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Control Of Temperature (AREA)
Abstract
The invention provides a method for controlling a glow plug 2 of a combustion machine of a vehicle, the glow plug 2 being driven by a first effective voltage, the first effective voltage being lower than the voltage of the battery of the vehicle when the combustion machine is running. The method comprising the following steps after the start of the combustion engine:a) estimating the initial temperature and/or the initial thermal energy of the glow plug 2b) if the temperature and/or the thermal energy is below a given value, heating the glow-plug by using a voltage higher than the first In step a) the temperature and/or initial thermal energy of the glow-plug 2 is estimated by a temperature and/or thermal energy value that was stored before the start of the vehicle in which the temperature and/or the thermal energy of the glow-plug 2 was calculated by the electric power in the glow-plug 2 and the power dissipation of the glow plug 2.
Description
}THOD FOR CONTROLLING A GLOW PLUG OF A CONBUSTION MACHINE OF
A VEHICLE AND CONTROLLER FOR A GLOW PLUG OF COMBUSTION
MACHINE OF A VEHICLE
The invention relates to a method for controlling a glow plug of a combustion machine of a vehicle and to a controller for a glow plug of combustion machine of a vehicle.
The WO 2007/033825 shows a control of a group of glow plugs for a diesel engine. The glow plugs are periodically connected with supply lines according to pulse-width modulated signals. To provide the glow plugs with the required energy, the voltage drop over the supply lines is calculated by the help of the measured glow plug current.
This calculation is done for each glow plug individually to *S....
* control its temperature. The method is well adapted for :o ceramic glow plugs of which the resistance strongly varies : ** over the temperature. On the other hand, this method uses a calculation based on a number of measurements and estimations including the risk that the control of the temperature is wrong.
It is accordingly an object of the invention to provide an alternative glow plug controller unit that provides a more precise control of the temperature of the glow plugs. It is a further object of the invention to provide a method for controlling a glow plug more precisely.
The invention provides a method for controlling a glow plug of a combustion machine of a vehicle, the glow plug being driven by a first predetermined effective voltage, the first predetermined effective voltage being lower than the voltage of the battery of the vehicle when the combustion machine is running, the method comprising the following steps after the start of the vehicle and before the start of the combustion machine: a) estimating an initial temperature and/or an initial thermal energy of the glow plug, b) if the temperature and/or the thermal energy is below a predetermined value, heating the glow plug by a effective voltage higher than the first predetermined effective voltage, whereby in step a) the initial temperature and/or initial thermal energy of the glow plug is estimated by a temperature and/or thermal energy value that was stored in a step z), before the start of the vehicle, in which the temperature and/or the thermal energy of the glow plug was calculated by the electric power in the glow plug and the power dissipation * .**S* * of the glow plug. The step z) may be performed at any point S.....
* 20' in time before the particular start of the vehicle, for : ,** example during a previous stop of the vehicle or a previous S...
run of the combustion machine. * . S * .*
This method permits to always get the desired glowing temperature and to maintain the glowing system quickness (and so engine readyness to start even in critical conditions like cold condition) without compromising the glow plug temperature.
In an embodiment, a step C) is provided, wherein the temperature and/or the thermal energy of the glow plug is calculated by the electric power in the glow plug and the power dissipation of the glow plug and the temperature and/or the thermal energy of the glow plug, step c) being applied at the same time and/or after step b) The invention is also related to a controller for a glow plug of a combustion machine of a vehicle, the glow plug being driven by a first predetermined effective voltage, the first predetermined effective voltage being lower than the voltage of the battery of the vehicle when the combustion machine runs, the controller comprising a start control device for controlling the glow plug after start of the vehicle and before start of the combustion machine, the start control device comprising: -a first estimation device for estimating an initial temperature and/or the initial thermal energy of the glow plug, -a heater for heating the glow plug in a heat-up mode by an effective voltage higher than the first predetermined effective voltage, if the temperature and/or the thermal * *�* ** * energy is below a predetermined value, :2 whereby the initial temperature and/or the initial thermal : *** energy of the glow plug is estimated in the first estimation means by a temperature and/or thermal energy value that was stored in a memory, the memory being written before the start of the vehicle by a second estimation device, the second estimation device for calculating the temperature and/or the thermal energy of the glow plug by the electric power in the glow plug and the power dissipation of the glow plug.
The invention will further be described based on the drawings illustrating embodiments of the invention.
Figure 3. illustrates a diagrammatic view of a glow system circuitry, Figure 2 illustrates a typical Fast heat-up voltage profile, Figure 3 illustrates typical characteristics of a glow plug, Figure 4 illustrates a method for controlling a glow plug of a combustion machine of a vehicle after the start of the vehicle and before the start of the engine, Figure 5 illustrates a method for controlling a glow plug of a combustion machine of a vehicle after the stop of the engine, Figure 6 illustrates typical characteristics of a glow plug, Figure 7 is an enlarged view of the temperature and the thermal energy of the glow plug versus time illustrated in Figure 6.
Figure 1 illustrates a diagrammatic view of a glow system circuitry 1. A key component of the glow system circuitry 1 is the glow plug 2. The tip 3 of the glow plug 2, sticking out into the combustion chamber 4 arranged in the engine body 5, can rise up to high temperatures (above 900 °C) by means * .**S* * of an electrical to thermal power conversion.
: ** Different technologies are available for glow plugs: **** *:*.; -High/Low voltage glow plugs: in relation to the nominal supply voltage of the component, for example 11V for high voltage; the nominal voltage is needed to match the nominal temperature in still air condition, -Metallic/Ceramic glow plugs: in relation to technology used for the glow plug and the heating element.
High voltage glow plugs are typically supplied directly by the vehicle battery, the d.c. supply.
Low voltage glow plugs, as they have a nominal voltage lower than battery voltage (for example 7V for ceramic glow plugs), typically need a PWM (pulse width modulation) supply to get the correct voltage (effective or RMS voltage) The glow system circuitry 1 illustrated in Figure 1 includes a low voltage glow plug 2 and a PWM supply 7 connected to the battery 6.
As an engine control unit (ECU) is activated, i.e. by a driver key-on command, the control unit evaluates the possible need to switch-on the glow plug 2. If the glow plug 2 is switched on, then ECU communicates to the driver, i.e. through a specific board lamp, to await a certain time before commanding engine cranking: this is in order to get the glowing system ready and the glow plugs hot to support engine ignition before proceeding.
Generally, to reduce this time awaiting and to improve *:*::* glowing system quickness, the low voltage glow plug 2 is supplied with a voltage higher than the nominal voltage: this can be done for a short time, just to reach as fast as * * possible the glow plug nominal temperature; then the voltage supply of the glow plug 2 is typically stepped down to the : ** glow plug's nominal voltage to keep the temperature reached. *...
*:*. This supply regulation is possible through the PWM supply 7 with different targets of effective voltages. The above-described method is also called "Fast heat-up" procedure.
Figure 2 illustrates a typical Fast heat-up voltage profile to be carried-out for such a Fast heat-up procedure for a ceramic glow plug. The time is shown on the abscissa and the effective voltage across the glow plug is shown on the ordinate.
Figure 3 illustrates typical characteristics of a glow plug, namely its temperature and its resistance versus time, and the effective voltage across the glow plug, the effective current into the glow plug and the thermal energy of the glow plug versus time.
Figure 4 illustrates a method for controlling a glow plug of a combustion machine of a vehicle after the start of the vehicle and before the start of the engine.
Several physical relationships will be used in the following, namely: la) Glow plug electrical power consumption: p(t) -12(t) i(t) ib) Glow plug electrical power consumption: v(t)2 p(t) R(t) wherein v(t) denotes the effective voltage across the glow *. plug, i(t) denotes the effective current into the glow plug and R(t) denotes the electrical resistance of the glow plug. * * *
* * 2) Glow plug energy content: 5(t) = fp(t) * 3a) Glow plug energy content after time T: rT E(T) J p(t)dt = 3 v(t) z i(t)dt o 0 3b) Glow plug energy content approximation after time T: 5(T) =j. U-J v(t)2dt Rt Rmo wherein Rm denotes a mean value of the electrical resistance of the glow plug determined through experimental test.
The temperature rise up, during the Fast heat-up procedure, is linked to the energy content of the glow plug due to electrical power supply.
The energy increase versus time can be calculated using electrical measurements. At least one of the two electrical parameters -Effective voltage v(t) applied to the glow plug -Effective current 1(t) flowing through the glow plug are available for ECU calculations.
A first method for the energy rise-up calculation is based on the assumption, that the effective voltage and current measurements both are available. Then, reference relationships la) and 3a) are used.
A second method for the energy rise-up calculation is based on the assumption, that only the effective voltage *:*::* measurement is available. Then, reference relationships ib) and 3b) are used. The value of Rm appearing in relation 3b) IS stored in the control unit. * a a
S.. *.
* Both methods include the following process steps: : ** An initial value of the energy is set at the start in step 10 S...
* either * S S * -to a previously calculated value if available, -to null value if the glow plug is recognized to be in a reference condition, -to a maximum value if none of the previous cases is applicable.
The reference condition may be the condition when is vehicle is produced. At this time, the temperature is estimated to be degree C. Differences in the ambient temperature can be neglected because the glow temperature is between 800 degree Celsius and 1000 degree Celsius.
The energy is then calculated in step 20 through power integration if all of the following conditions are met: -the engine is stopped and -the voltage applied across the glow plug is higher than the nominal voltage.
Once the calculation has started, as soon as one of the above conditions is not met any longer, the energy calculation is frozen and the actual value of the energy is stored in step 30.
Figure 5 illustrates a method for controlling a glow plug of a combustion machine of a vehicle after the stop of the engine. The temperature fall down, during glow plug cooling (neither electrical supply nor combustion heat), is linked to 0*.* .,.. the energy content fall down due to heat exchange with the environment. * * *
**.p** * 20 The energy decrease versus time can be calculated starting . from a set of numerical values, recognizable through a...
experimental test and settable in the control, representing energy gradient as dependent on energy content.
A first method for the energy fall down calculation is based on the assumption, that p(t) due to heat exchange with environment is recognizable through experimental test as dependent, mainly but not only, on the glow plug energy content. Then, reference relationship 3a) is used.
The method includes the following process steps: An initial value of the energy is set at the start in step either -to a value computed at rise-up end if Fast heat-up is performed and no engine running occurred later on or -to a value settable in the control unit, recognizable through experimental test, and related to the glow plug thermal status due to power supply and/or combustion heat.
The energy is then calculated in step 120 through power integration if all of the following conditions are met: -the engine is stopped and -the voltage applied across the glow plug is zero.
Once the calculation has started, as soon as one of the above conditions is not met any longer, the energy calculation is frozen and the actual value of the energy is stored in step * ** * * * * ** S... * . *
The energy rise-up and energy fall down calculations are * S....
* carried on according to the glow plug supply voltage and to *...
* 2 the engine status (running or stopped) as previously : *, described in relation with Figures 4 and 5. A fast heat-up S...
*:*. voltage profile, generally indicated in terms of effective voltage versus time profile, is applied to the glow plugs until the energy content rises up to a maximum threshold set in the control: this threshold is recognizable through experimental test and corresponds to the glow plug nominal temperature and could depend on some engine parameters (i.e. engine coolant temperature).
As illustrated in Figures 6 and 7, this kind of management permits to always get the desired glowing temperature, and to maintain the glowing system quickness (and soengine readyness to start even in critical conditions like cold condition) without compromising the glow plug temperature.
As a result of this management the Fast heat-up procedure applied to the glow plugs is varied according to the glow plug's thermal status (represented by the energy content).
Special benefits of this management can be observed with un- predictable driver operations such as consecutive key-on/key-off/key-on.
Figure 6 illustrates typical characteristics of a glow plug, namely its temperature versus time, and the effective voltage across the glow plug, the effective current into the glow plug, the dissipated power and the thermal energy of the glow plug versus time. Moreover, the "key-on" periods, i.e. the phases at which the vehicle is started, are illustrated in the lowermost graph by the value "1". The glow plug is ***,* controlled according to the methods of the invention described in relation with Figures 4 and 5. * S *
***...
2 Figure 7 is an enlarged view of the temperature and the : *, thermal energy of the glow plug versus time illustrated in S...
Figure 6. Moreover, the "key-on" periods, i.e. the phases at which the vehicle is started, are illustrated in the lowermost graph by the value "1".
Claims (3)
- Claims: 1. Method for controlling a glow plug of a combustion machine of a vehicle, the glow plug being driven by a first predetermined effective voltage, the first predetermined effective voltage being lower than the voltage of the battery of the vehicle when the combustion machine is running, the method comprising the following steps after the start of the vehicle and before the start of the combustion machine: a) estimating an initial temperature and/or an initial thermal energy of the glow plug, b) if the temperature and/or the thermal energy is below a predetermined value, heating the glow plug by a effective voltage higher than the first predetermined effective voltage, whereby in step a) the initial temperature and/or initial thermal energy of the glow plug is estimated by a temperature and/or thermal energy value that was stored in a step z), before the start of the vehicle, in which * ,* the temperature and/or the thermal energy of the glow plug :::; was calculated by the electric power in the glow plug and the power dissipation of the glow plug.
- 2. Method according to claim 1, characterized in a step c), wherein the temperature and/or the thermal energy of the glow plug is calculated by the electric power in the glow plug and the power dissipation of the glow plug and the temperature and/or the thermal energy of the glow plug, step C) being applied at the same time and/or after step b).
- 3. Controller for a glow plug of a combustion machine of a vehicle, the glow plug being driven by a first predetermined effective voltage, the first predetermined effective voltage being lower than the voltage of the battery of the vehicle when the combustion machine runs, the controller comprising a start control device for controlling the glow plug after start of the vehicle and before start of the combustion machine, the start control device comprising: -a first estimation device for estimating an initial temperature and/or the initial thermal energy of the glow plug, -a heater for heating the glow plug in a heat-up mode by an effective voltage higher than the first predetermined effective voltage, if the temperature and/or the thermal energy is below a predetermined value, whereby the initial temperature and/or the initial thermal energy of the glow plug is estimated in the first * ***.* * 2J estimation means by a temperature and/or thermal energy : *, value that was stored in a memory, the memory being written before the start of the vehicle by a second estimation device, the second estimation device for calculating the temperature and/or the thermal energy of the glow plug by the electric power in the glow plug and the power dissipation of the glow plug.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0818207.3A GB2464128B (en) | 2008-10-02 | 2008-10-02 | Method for controlling a glow plug of a combustion machine of a vehicle and controller for a glow plug of combustion machine of a vehicle |
| RU2011113790/07A RU2011113790A (en) | 2008-10-02 | 2009-07-27 | METHOD FOR CONTROLING THE IGNITION CANDLE ENGINE OF THE VEHICLE OF THE VEHICLE AND THE CONTROLLER OF THE IGNITION CANDLE OF THE ENGINE OF THE INTERNAL COMBUSTION OF THE VEHICLE |
| US13/122,166 US20110246045A1 (en) | 2008-10-02 | 2009-07-27 | Method for controlling a glow plug of a combustion machine of a vehicle and controller for a glow plug of combustion machine of a vehicle |
| CN200980139081.0A CN102171441B (en) | 2008-10-02 | 2009-07-27 | Method for controlling a glow plug of a combustion machine of a vehicle and controller thereof |
| PCT/EP2009/005433 WO2010037439A1 (en) | 2008-10-02 | 2009-07-27 | Method for controlling a glow plug of a combustion machine of a vehicle and controller for a glow plug of combustion machine of a vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0818207.3A GB2464128B (en) | 2008-10-02 | 2008-10-02 | Method for controlling a glow plug of a combustion machine of a vehicle and controller for a glow plug of combustion machine of a vehicle |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0818207D0 GB0818207D0 (en) | 2008-11-12 |
| GB2464128A true GB2464128A (en) | 2010-04-07 |
| GB2464128B GB2464128B (en) | 2013-07-31 |
Family
ID=40042292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0818207.3A Expired - Fee Related GB2464128B (en) | 2008-10-02 | 2008-10-02 | Method for controlling a glow plug of a combustion machine of a vehicle and controller for a glow plug of combustion machine of a vehicle |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20110246045A1 (en) |
| CN (1) | CN102171441B (en) |
| GB (1) | GB2464128B (en) |
| RU (1) | RU2011113790A (en) |
| WO (1) | WO2010037439A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2302200A1 (en) * | 2009-08-19 | 2011-03-30 | BorgWarner BERU Systems GmbH | Method for operating a glow plug when an engine is running |
| DE102010001662A1 (en) * | 2010-02-08 | 2011-08-11 | Robert Bosch GmbH, 70469 | Method and device for operating a glow plug in an internal combustion engine of a motor vehicle |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9683536B2 (en) * | 2013-05-16 | 2017-06-20 | Ford Global Technologies, Llc | Enhanced glow plug control |
| JP6075247B2 (en) * | 2013-08-29 | 2017-02-08 | マツダ株式会社 | Glow plug control device and glow plug temperature estimation method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5372102A (en) * | 1990-12-22 | 1994-12-13 | Mercedes-Benz Ag | Process for heating the intake air in internal-combustion engines by means of a flame starting system |
| US20050081812A1 (en) * | 2003-10-17 | 2005-04-21 | Beru Ag | Method for heating a glow plug for a diesel engine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5746067A (en) * | 1980-09-04 | 1982-03-16 | Nippon Denso Co Ltd | Glow plug preheating device |
| JPS5941673A (en) * | 1982-09-01 | 1984-03-07 | Nippon Soken Inc | Glow plug control device |
| JPS5968570A (en) * | 1982-10-14 | 1984-04-18 | Nissan Motor Co Ltd | Preheating control device of diesel engine |
| EP0964996B1 (en) * | 1997-03-06 | 2003-02-26 | Continental ISAD Electronic Systems GmbH & Co. oHG | Auxiliary starting device for a diesel engine and method for starting a diesel engine |
| JP2001336468A (en) * | 2000-03-22 | 2001-12-07 | Ngk Spark Plug Co Ltd | Glow plug control device, grow plug, and detecting method of ion inside engine combustion chamber |
| ITBO20050326A1 (en) * | 2005-05-06 | 2006-11-07 | Magneti Marelli Powertrain Spa | INTERNAL COMBUSTION ENGINE PROVIDED WITH A HEATING DEVICE IN A COMBUSTION CHAMBER AND METHOD OF CHECKING THE HEATING DEVICE |
| FR2910564B1 (en) * | 2006-12-22 | 2013-05-10 | Renault Sas | METHOD FOR CONTROLLING THE ELECTRIC POWER SUPPLY OF A PRE-HEATING CUP FOR AN INTERNAL COMBUSTION ENGINE |
-
2008
- 2008-10-02 GB GB0818207.3A patent/GB2464128B/en not_active Expired - Fee Related
-
2009
- 2009-07-27 RU RU2011113790/07A patent/RU2011113790A/en not_active Application Discontinuation
- 2009-07-27 CN CN200980139081.0A patent/CN102171441B/en not_active Expired - Fee Related
- 2009-07-27 WO PCT/EP2009/005433 patent/WO2010037439A1/en active Application Filing
- 2009-07-27 US US13/122,166 patent/US20110246045A1/en not_active Abandoned
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5372102A (en) * | 1990-12-22 | 1994-12-13 | Mercedes-Benz Ag | Process for heating the intake air in internal-combustion engines by means of a flame starting system |
| US20050081812A1 (en) * | 2003-10-17 | 2005-04-21 | Beru Ag | Method for heating a glow plug for a diesel engine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2302200A1 (en) * | 2009-08-19 | 2011-03-30 | BorgWarner BERU Systems GmbH | Method for operating a glow plug when an engine is running |
| US8577583B2 (en) | 2009-08-19 | 2013-11-05 | Borgwarner Beru Systems Gmbh | Method for operating a glow plug with the engine running |
| DE102010001662A1 (en) * | 2010-02-08 | 2011-08-11 | Robert Bosch GmbH, 70469 | Method and device for operating a glow plug in an internal combustion engine of a motor vehicle |
| DE102010001662B4 (en) * | 2010-02-08 | 2011-09-01 | Robert Bosch Gmbh | Method and device for operating a glow plug in an internal combustion engine of a motor vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| US20110246045A1 (en) | 2011-10-06 |
| CN102171441B (en) | 2015-04-01 |
| GB0818207D0 (en) | 2008-11-12 |
| GB2464128B (en) | 2013-07-31 |
| CN102171441A (en) | 2011-08-31 |
| WO2010037439A1 (en) | 2010-04-08 |
| RU2011113790A (en) | 2012-10-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S30Z | Assignments for licence or security reasons |
Free format text: APPLICANT GM GLOBAL TECHNOLOGY OPERATIONS, INC SECURITY TO THE UNITED STATES DEPARTMENT OF THE TREASURY |
|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20171002 |